Import Vat on zero rated goods

little_footprint

Since Brexit there are some issues with imports from the EU, particularly on the treatment of zero rated goods, such as children's clothing and footwear. Freight forwarders and couriers are charging import vat on zero rated goods, despite customs declarations and invoices detailing goods as children's clothing. I have a few questions:

1. Where import vat has been incorrectly charged, can it be reclaimed via the vat return (if a C79 vat certificate is issued from HMRC)?
2. Is it the responsibility of the freight forwarders or couriers, to collect the correct details from the customs declaration and invoice, to decide if import vat is due and payable? If not, how should this be dealt with for zero rated goods?

Thanks for any information